Improvement in locks



UNITED STATEs PATENT GEICE JAMES T.,GUTHB1E, OF LEESBURG, OHIO.

IMPROVEMENT IN LOCKS.

Specification forming part of Letters Patent No. 57,704, dated September 4, 1866; antedated August 17, 1866.

To all whom it may concern.'

Be it known that I, JAivnts T. GUTERIE, of Leesburg, Highland county, and State of Ohio, have invented a new and useful Improvement in Lever-Locks, of which the following is a full and clear description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to a new device by means of which one or more bolts of lock may be kept out, preventing the entrance of one not acquainted with the interior construction of the lock.

Figure 1 represents a perspective view of the interior of my improved lock, the back plate being removed. Fig. 2 is a plan ofthe interior of the lock, showing different positions of the bolts in connection with the key. Fig. 3 is alongitndinal sectional view taken through the center of one of the bolts. Fig. 4 is a plan of the key adapted to the lock.

-In the drawings, A represents the body of the lock. B and Bl are bolts, which slide back and forth longitudinally in slots a' in transverse partition a, and slots in one end of the body of the lock. Bolt B has two springchecks, C, composed of two parts, a spring, c, riveted to or otherwise secured to the bolt, having at theirfrce end pins c. Openings in bolt B admit pins c', when spring c is depressed. A spring-check, O', attached to bolt B', correspends to the forward spring-check upon bolt B, both in position, near the outer end of the bolt, and in construction. The rear or tuinbler" end of the bolts B and B' havey upon their outer edges springs b and b', which press upon the side edges of slots a', keeping the recessed and inner edges of bolts B and B in close contact with inner edges of slots a'. A pin, d, projects from bolt B at thc same distance from spring-check O' that are the sprin gchecks O upon bolt B. A guard-bolt, D, of the thickness of and situated between the bolts B andB ,is secured to the sliding incline D'. The guide-bolt D passes through an aperture in partition d'. Pivoted to the permanent pin E, which passes up vertically between the opposite walls of sliding incline D', is lever F, having projecting from its ends, and on the side opposite partition a, the lugs f and f. A spring, Gr, rests upon lever F, its ends g bearing upon back plate of the lock. To the foot of sliding incline D' is attached the spring h, which bears against the rear end of the body of the lock, a catch-spring, fi, having stop i' attached, which face-bolt B catch-spring z' has near its end lip i". In the body of the lockA is the key-hole A'.

The key represented in Fig. 4 has a thin handle, H, shank or stem I, and bit J, the bit being in two parts denominated upper '7 and lowerJ The lower part has a lug which, in revolution of the key, engages the lip i", forming part of catch-spring t'.

Operation: To throw the bolts B and B' for the purpose of locking a door to which the lock is secured, the key is inserted in key-hole A', the bit is passed above and beneath bolt B, spring-check C is depressed, allowing the upper part of the bit to pass into the space between the two spring-checks G, the motion ofthe key is reversed,and the bit madeto bear upon pin c'. rlhe bolt B is then thrown out. The bit of the key beingn'nall y disengaged, the rotation to the right is continued until the bit has passed into the space between springcheck O' and pin d. The key being then turned to the left the bolt B is thrown out, when the key may be removed or left in the lock.

To open the door it is necessary, rst, to throw back the guard-bolt D, when sliding incline D' passes beneath lever F, elevating it above the bolts B and B. The catch-spring i presses upon the side of the aperture in partition d' until stop t" shall have engaged the partit-ion d', so as to prevent the further movement of guard-bolt D, the spring h keeping the stop r in close contact with partition d'. The bit of the key is then brought to bear upon pin el in bolt B by rotating the key to the right. Upon the lower part of the bit of the key-lug which engages lip fi" near the end, and projecting from catch-spring i, the guardbolt D is liberated; but lever F has one end resting upon bolt B', and does not fall down The key has two distinct uses. The handle H is rst inserted in the key-hole and guardbolt D pressed back. It is then withdrawn, and bitJrmade to throw the bolts, as above described. Unless the guard-bolt D is thrown back, thus elevating lever F above the bolts B and B', the throwing back of one bolt will place eitherlug f orf' in Contact with the back end of the body A of the lock. The other end of lever F is thrown so far forward that the second bolt cannot be thrown in without throwing the first out, thus keeping the door locked.

Having described my invention, the use and operation of its various parts, I-make theiollowing claims, which I desire to secure by Letters Patent.

JAS. T. GU'rHRIE.

Witnesses:

E. P. JOHNSON, L. HoRsBY. 

